Chris Lattner ab64fd39d2 Allow single-bit integer types to have signs. A signed one bit integer is either 0 or -1.
Reviewers: rriddle!

Subscribers: mehdi_amini, rriddle, jpienaar, burmako, shauheen, antiagainst, nicolasvasilache, arpith-jacob, mgester, lucyrfox, liufengdb, Joonsoo, grosul1, frgossen, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D77832
2020-04-09 15:23:06 -07:00
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2020-03-06 13:25:18 -08:00